Demountable rim.



DEMOUNTABLE RIM.

APLICATION FILED FEB. H. |917.

,2?34536 Patented July 911918.

2 SHEETS-SHEET 2.

INVENTOR OSCAR ONEAL, OF FREMONT, MICHIGAN DEM OUNTABLE BIM.

Specification of Letters Patent.

Patented July 9, 1918.

Application tiled February 17, 1917. Serial No. 149,247.

To all whomz't may concern: f

Be itv known that I, OSCAR ONEAL, a citizen of the United States,residing at Fremont, in the county of Newaygo and State of Michigan7have invented new and useful Improvements in Demountable Rims, of whichthe following is a specification.

Myinvention relates te demountable rims which:

Figure l is a front elevation of a vehicle wheel embodying my invention.

Fig. 2 is a partial sectional. front. elevation of the same.

Fig. 3 is an enlarged sectional view on the line a-a of Fig. 1.

Fig. 4 is a side elevation of a portion of the inner surface of theouter rim.

Fig. 5 is a side elevation of the correspondingou'ter surface of theinner rim.

Fig. 6 is a side elevation of a portion of the inner surface of theouter rim.

Fig. 7 is a. transverse sectional view through the Wheel taken at theval ve stem.

Fig. 8 is a detail View of the wedge.

Like characters of reference indicate `like parts in the various views.

In the drawings l designates the folly of a wheel upon thecircumferential surface of which an inner rim 2 is fxedly mounted.Outwardly-extending lugs 3 are formed on the outer surface of said rimat intervals around the circumference of the same, and

extend obliquely to the elements of said outer surface, all of the saidlugs having the same angularity respecting the elements of said surfaceand extending in the same direction relative to said elements. Acircumferential flange 4 is formed 0n thefar edge of said inner rim andextends outwardly from said rim. An outer rim 5 is provided, thedialneter of the inner surface of which is adapted to engage the tops oflugs 3 of said inner rim. inwardly extending lugs 7 are formed on theinner surface of said outer rim 5 at intervals corresponding to theintervals at which lugs 3 are disposed upon said inner rim. Said lugs 7have the same angularity respecting the elements of said inner surfaceas lugs 3 have respecting the outer surface of said inner rim and extendin thesame direction. The height. of said lugs 7 is substantially thesame as that of lugs 3. The far edge 8 of said outer rim 5 is adapted toabut said circumferential ange 4. A positioning shoulder 9 is disposedon the outer surface of said inner rim. An opposing positioning shoulder10 is disposed upon the inner surface of said outer rim far enough awayfrom said shoulder 9 when the rims are in locked position so that thelugs 7 and 3 may be'properly disengaged to remove said outer rim fromsaid inner rim as hereinafter described. A positioning wedge l1 isprovided having its lat-eral edges engageable with the opposing faces ofsaid positioning shoulders. In applying the outer rim to the inner rimthe outer rim is positioned circumferential respecting said inner rim sothat the far ends of lugs 7 will clear the near end of lugs 3 when saidouter rim is moved laterally upon said inner rim. The outer rim is thenpushed on to the'inner rim until the far edge 8 of the inner rim abutsthe circumferential flange et to the inner rim. The outer rim is thenmoved circumferentially so that the lugs 7 are brought into workingrelation with said lugs 3. The opposing faces of positioning shoulders 9and 10 are moved away from cach other in this movement, and when thelugs 3 and 7 are in engagement and the edge 8 and iange 4 abut eachother. the wedge l1 is placed between shoulders 9 and l0 and forced intoplace. This movement of wedge 11 tends to move thc outer rimcircumferentially about the inner rim and forces lugs 3 and 7 into atight engagement. By reason of the oblique engagement of the lugs 3 and7 and the direction of the same respecting the wedging adtio abovereferred to, the outer rim is forced laterally toward the far edge ofthe inner rim. The engagement of the far edge 8 of the outer rim andange 4 of the inner rim confines the lateral movement of said outer rim.Thus, the engagement of wedge ll with opposingshoulders 9 and 10 holdslugs 3y and 7 in engagement and by means of the engagement of said lugsholds the far edge 8 and Harige 4 in engagement, and thereby iirmlyholds the outer ,rim upon the inner rim. An inwardly exteiiding iange 12is formed on the near edge of the inner rim. A holo 13 is providedtherein in proximity to the working surface or' shoulder'lO. A laterallyextending inclosure 14 is formed in the folly ot' the wheel andcommunicates with said hole 13. A 'locking pin 14 is disposedv in saidhole and extends into said inqlosure. A compression spring l5 isdisposed upon said pin in said inclosure, having its near end engagingthe bottom of said inclosure, and having its other end engaging a washer16 mounted on the end of said pin and/secured thereto by a Cotter pin 17engaging a transverse hole in said pin near the end thereof. By reasonof its engagement with said pin, said spring tends to pull the p in intothe inclosure. A dust cap 18 is screw threaded in the open end of saidinclosure to prevent mud and dirt getting into said inclosure. rl`heouter end ot' said pin 14 is formed transversely to the body of the pinand is adapted to engage a notch 19 on the near edge of the wedge 1lwhen said wedgev is in place between the shoulders 9 and l0. Said spring15 is strong enough to hold said wedgepll from working out of its properposition during the use of the rim.

The far edge of wedge ll has aprojection 11 formed thereon' whichextends through a slot 2j1 in flange @when said wedge is in workingposition. In .removing said wedge preparatory to removing the outer rimthe pin 14 is raised and rotated so that the outer end of the same willnot interfere with the removal of wedge 11. The projection 20 is thentapped lightly with a hammer or other similar tool and. the wedge isthus loosened Vfrom engagement with shoulders 9 and l0. The rim l isthen moved circumferentially so that lugs 3 and 7 are free fromeachother and the rim is then moved laterally and disengaged from theinner rim. s In order that a pneumatic tire may be 'easily applied theouter rim-is split laterallyN On one side 'of the extending slot 22 isformed longitudinally parallel and ally toward each other so that slotis narrower vthan* the 1 end of said slot is open while the far' end isprovided with a stopl 23. A hook 24 is formed on said rim on the otheryside of said split and extends* beyond the gagement with said slot. Theend of said hook is formed to engage slot 22 so that by -said engagementthe rim is firmly held lin. 6o shape, and said hook can only beWithdrawn from said'slot by laterally moving the hook having its sidesthe top of the end of said rim toward the near side of the slot end ofsaid rim. The rim istlexible enough to allowthis movement. A circumferential extending shoulder 25 is formed split a laterally slantinglaterbottom. The nearn same for enf on said outer rim near said hook. Aplug 26 is formed on said inner rim and so positioned respecting saidshoulder25 that when the outer rinris locked upon said inner rini itsfar edge engages the 'near edge of Ashoulder 25 and thus positivelyprevents hook 24 fromwithdrawing from or tending to withdraw `from saidslot 22 lwhen the rims are in locked position. The engagement of hook 2lwith slot 22 prevents the ends of the outer rim from spreading.

It will be noted that by reason of the circumferential movement of theouter rim lrespecting the inner riin which is necessary to apply the rimor to demount the same, the ordinary radially disposed valve stem whichis generally usedfon pneumatic tires, and

which extends through a hole in the inner rim and the felly of theWheel, would necessarily have to extend through a circumferentiallydisposed slot in said inner -rim and felly to allow n1y1rim to Ibe putonor demounted. A slot of the proper length for this purpose would weakenthe rim and felly 1 provide avalve stem of a consomewhat. structionwhich is adapted for use on any type of rim and which dispenses with thenecessity of removing the outer rim by pull- -ing the sides of the outerrim opposite from '29. A longitudinal hole 30 is formed in saidlaterally extending endv and isscrew threaded and shouldered to receivethe check valve 31 of usual construction and a .cap 32 of l usualconstruction engages the screw threads Aat the end 29. The otherl end ofsaid valve stem has an enlarged screw threaded recess 33 formedtherein', the open side of saidrecess facing outwardly. Hole l30communicates with said recess 33. An inner tube 34 115 of usualconstruction is provided -with a hole 35.A A stem 36 is provided havinga broad flange formed at one end and adapted to engage the inner surfaceof tube 34. The stem 36 extends through said hole 35 and termi- 12`natos in a screw threaded end 38 Which is adapt-edD to lengage the screwthreaded recess A longitudinally extending hole 38 is formed in saidstem 36. vA Washer 394 is provided having a hole therein adapted toslideIove'` stern 36. A key-way 40 in said hole is adaple'dlto engage aproject-ion 41 on stern 36 to prevent said Washer from rotating on saidf stem. Said washer 39. is adapted to be env gaged With a wrench ofusual construction.

Lavasaa In the assembly of the valve stemthe parts are assembled asbefore described .and the angular stem 28 tightened upon stem 36 so thatit extends laterally to the plane of the on rim 5 on opposite sides ofthe hole 27 and prevent the valve stem 28 from turning on its threadedengagement the -stem- 36, and

4thus loosening and allowing air to escape from the tube 34. A cover 42is' provided and is held upon said shoulders 41 by a spring engagementtherewith and is adapt- Aed to protect the valve stem from injury.

Having thus fully described my invention7 I claim:

In a Vehicle wheel an inner rim, lugs formed onthe outer surface of saidinner rim, an outer rim, lugs formed upon the inner surface of saidouter rim and engageable with said lugs on said inner rim, a flange onsaid inner rim engaged by said outer rim for preventing lateraldisplacement thereof, spaced yshoulders on' the inner and cuterVperipheries of said outer and inner rims respec'tively, a wedge' drivenbetween said shoulders whereby said outer rim is moved to engage saidlugs with one another, a reduced tongue on the narrow end of said wedgepassing through a hole in said ilange, a socket member secured laterallyof the felly, a pin slidable and rotatable in said socket and having anangular end engageable within the notch in the wide end of said .wedge,and a spring surrounding said pin OSCAR @NEAL

